WOPUSAI 4100 Series 38kVA Open Frame Diesel Generator, Prime Power for Small Retail Shops

Product Overview

The WOPUSAI 4100 series 38kVA diesel generator set adopts reliable 4100D 4-cylinder diesel engine, matched with STC brushed self-excited alternator. Designed for standby power and medium-duty prime power supply, this compact genset delivers steady power for small factories, construction sites and commercial emergency power projects. Featuring simple mechanical speed regulation and naturally aspirated structure, it is easy to operate, convenient for maintenance and has strong environmental adaptability, which is a cost-effective power solution for various on-site power demand.

Product Showcase

Complete open-frame genset assembly, WOPUSAI 4100 series diesel engine unit, STC brushed self-excited all-copper alternator, industrial-grade control cabinet, complete piping assembly and heavy-duty high-capacity water cooling radiator. 

Key Specifications

Core Advantages

✅ Mature 4-Cylinder Naturally Aspirated Engine: The 4100D four-cylinder direct injection engine with natural aspiration has stable performance, low failure rate, good fuel economy and wide availability of spare parts globally.

✅ STC Brushed Self-Excited Alternator: Pure copper winding design paired with AVR automatic voltage regulator, fast voltage build-up and stable output. The brushed structure is simple for inspection, repair and component replacement.

✅ Simple Mechanical Speed Governing System: Mechanical governor with straightforward structure, less electronic components, strong anti-interference capability, works reliably even in harsh construction-site environments.

✅ Compact Footprint & Light Weight: Small overall dimension and 800kg weight, easy for transportation, installation and on-site movement, ideal for limited-space installation scenarios.

✅ IP22 Protection Grade: Prevents solid foreign objects and splashing water, suitable for open-frame installation in workshops, construction yards and small backup power rooms.

🎯 Application Scenarios

Small factory standby power, construction site temporary power supply, rural power grid backup, shopping mall & store emergency power, small pumping stations, residential area backup power and small mining auxiliary power. Suitable for intermittent and medium-duration continuous power operation.

⚙️ Optional & Customization

• Silent canopy / Mobile trailer chassis
• ATS automatic transfer switch for automatic startup once mains power fails
• Multi-protection control system (overspeed, high temperature, low oil pressure, overcurrent protection)
• Extended base fuel tank, remote monitoring module
• Custom painting and brand logo printing

📦 Packaging Standards

Standard export steel frame packing with shockproof fixing, protect engine and alternator against collision during long-distance sea and land transportation. Export plywood case is also available upon request.

🚛 Shipping & Delivery

We support FOB, CIF, DDP and other international trade terms. Goods can be delivered within 7-15 working days after receiving deposit. Packing list, commercial invoice and full set of factory test reports will be supplied for customs clearance.

🏢 Brand Introduction

Wopusai Mechanical and Electrical is a professional manufacturer integrating R&D, production and sales of diesel generator sets. We provide complete power solution including genset, spare parts and after-sales maintenance. Every unit will pass strict factory load test before delivery. We supply high-performance generator products to global customers, with 24/7 technical support and worldwide after-sales service.